Advanced Ultrasound Screening for Temporomandibular Joint (TMJ) Internal Derangement

Figure 1

Position of the probe on the skin surface for traditional (a) transverse and (b) coronal scans. The probe position during routine interrogation of the TMJ is (c) angled parallel to the disc in the sagittal plane at 50–60° below the horizontal as measured from the anterior side of the probe or 5 o’clock position in the closed-mouth position on the right, (d) angled parallel to the disc or 3 o’clock position in the half-open-mouth position on the right, and (e) angled 50–60° above the horizontal as measured from the anterior side of the probe in the fully open-mouth or 1 o’clock position on the right. In a similar manner, these angles represent 7 o’clock, 9 o’clock, and 11 o’clock positions when investigating the TMJ on the left.

(a)

(b)

(c)

(d)

(e)